US11903259B2 - Flexible display panel - Google Patents
Flexible display panel Download PDFInfo
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- US11903259B2 US11903259B2 US16/966,035 US202016966035A US11903259B2 US 11903259 B2 US11903259 B2 US 11903259B2 US 202016966035 A US202016966035 A US 202016966035A US 11903259 B2 US11903259 B2 US 11903259B2
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- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 238000005538 encapsulation Methods 0.000 claims abstract description 18
- 239000010409 thin film Substances 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- 229910004205 SiNX Inorganic materials 0.000 claims description 7
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- 229910003087 TiOx Inorganic materials 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 229910007667 ZnOx Inorganic materials 0.000 claims description 6
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 150000003384 small molecules Chemical class 0.000 claims description 4
- 229910000951 Aluminide Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
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- 239000004642 Polyimide Substances 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 230000004044 response Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present invention relates to a field of display panels and in particular, to a flexible display panel.
- OLED Organic light-emitting diodes
- advantages such as a high contrast ratio, fast response speed, self-luminescence, and operation in a wide temperature range. Therefore, they have gradually become a mainstream in the small-size display industry.
- liquid crystal displays and quantum dot light-emitting diode technology are also improving, which brings many challenges to the development of OLED.
- OLED Compared with other display technologies, flexible OLEDs more easily achieve flexible display, while it is difficult to achieve by other technologies, but OLED also has its own shortcomings. For example, because OLED luminescent materials are currently subject to an organic small molecule evaporation process, its service life is much shorter than that of a liquid crystal display. OLED lifespans are limited by factors such as the material itself, evaporation conditions, and operating voltages. Therefore, it is necessary to comprehensively consider the efficiency and service lives of red, green, and blue light-emitting materials so as to optimize the efficiency and lower power consumption of light-emitting elements.
- the present invention provides a flexible display panel whose structure can ensure the maximum efficiency of red and green light, and at the same time can also effectively improve the efficiency of blue light, simplify an evaporation process, and reduce the production costs.
- the present invention provides a flexible display panel.
- the flexible display panel comprises an array substrate, an organic light-emitting layer, a cathode layer, an optical coupling output layer, and a thin film encapsulation layer.
- the array substrate is provided with an anode layer.
- the organic light-emitting layer is disposed on the anode layer and comprises a red pixel unit, a green pixel unit, and a blue pixel unit.
- the cathode layer is disposed on the organic light-emitting layer.
- the optical coupling output layer is disposed on the cathode layer and arranged corresponding to the red pixel unit and the green pixel unit of the organic light-emitting layer.
- the thin film encapsulation layer is disposed on the optical coupling output layer.
- the thin film encapsulation layer corresponding to the blue pixel unit of the organic light-emitting layer is in contact with the cathode layer.
- the optical coupling output layer is produced by evaporation deposition or by printing a small molecule organic material.
- the thin film encapsulation layer comprises a first inorganic barrier layer, an organic barrier layer, and a second inorganic barrier layer.
- the first inorganic barrier layer is disposed on the optical coupling output layer and the cathode layer corresponding to the blue pixel unit.
- the organic barrier layer is disposed on the first inorganic barrier layer.
- the second inorganic barrier layer is disposed on the organic barrier layer.
- the first inorganic barrier layer comprises a first inorganic layer and a second inorganic layer.
- the first inorganic layer has a refractive index greater than or equal to 1.76 and less than or equal to 2.
- the second inorganic layer is disposed on the first inorganic layer, and a water vapor transmission rate of the second inorganic layer is less than 1 ⁇ 10 ⁇ 4 g/(m 2 ⁇ 24 h).
- material of the first inorganic layer comprises any one of SiNx, SiONx, TiOx, or ZnOx.
- material of the second inorganic layer comprises any one of SiNx, SiONx, SiOx, Al 2 O 3 , TiOx, ZrO 2 , or ZnOx.
- the first inorganic barrier layer comprises a third inorganic layer disposed between the first inorganic layer and the second inorganic layer, and a refractive index of the third inorganic layer is less than or equal to 1.55.
- material of the third inorganic layer comprises SiOx, SiONx, or organic aluminide.
- the first inorganic barrier layer comprises a fourth inorganic layer disposed on the second inorganic layer, and a refractive index of the fourth inorganic layer is less than or equal to 1.55.
- material of the fourth inorganic layer comprises SiOx or SiONx.
- the present invention provides a flexible display panel.
- the optical coupling output layer By not arranging the optical coupling output layer at a position corresponding to the blue pixel unit, power consumption is reduced, and a service life of the flexible display panel is prolonged.
- the first inorganic barrier layer of the thin film encapsulation layer completely replaces the optical coupling output layer at the position corresponding to the blue pixel unit. Therefore, the present invention can not only maximize the efficiency of red and green light, but also effectively improve the efficiency of blue light. Meanwhile, an evaporation process is simplified, and production costs are also reduced.
- FIG. 1 is a schematic structural view illustrating a flexible display panel according to a first embodiment of the present invention
- FIG. 2 is a schematic structural view illustrating a thin film encapsulation layer according to the first embodiment of the present invention
- FIG. 3 is a schematic structural view illustrating an array substrate according to the first embodiment
- FIG. 4 is a schematic structural view illustrating an organic light-emitting layer according to the first embodiment
- FIG. 5 is a schematic structural view illustrating the thin film encapsulation layer according to a second embodiment.
- FIG. 6 is a schematic structural view illustrating the thin film encapsulation layer according to a third embodiment.
- a first element being “above” or “below” a second element can indicate that the first and second elements are in direct contact with each other, or the first and second elements are not in direct contact but are in contact with another element between them.
- the first element being “above”, “over”, or “on” the second element can indicate that the first element is right above or obliquely over the second element, or simply means that the first element is disposed at a higher level than the second element.
- the first element being “under”, “below”, or “beneath” the second element can indicate that the first element is right under and obliquely below the second element, or simply means that the first element is disposed at a lower level than the second element.
- a flexible display panel 100 is provided according to the first embodiment of the present invention.
- the flexible display panel 100 comprises an array substrate 1 , an organic light-emitting layer 2 , a cathode layer 3 , an optical coupling output layer 4 , and a thin film encapsulation layer 5 .
- the array substrate 1 is provided with an anode layer 111 .
- the organic light-emitting layer 2 is disposed on the anode layer 111 and comprises a red pixel unit 201 , a green pixel unit 202 , and a blue pixel unit 203 .
- the cathode layer 3 is disposed on the organic light-emitting layer 2 .
- the optical coupling output layer 4 is disposed on the cathode layer 3 and arranged corresponding to the red pixel unit 201 and the green pixel unit 202 of the organic light-emitting layer 2 .
- the thin film encapsulation layer 5 is disposed on the optical coupling output layer 4 .
- the thin film encapsulation layer 5 corresponding to the blue pixel unit 203 of the organic light-emitting layer 2 is in contact with the cathode layer 3 .
- the optical coupling output layer 4 is produced by evaporation deposition or by printing a small molecule organic material.
- the optical coupling output layer 4 is disposed on the cathode layer and arranged only in positions corresponding to the red pixel unit 201 and the green pixel unit 202 of the organic light-emitting layer 2 , not in positions corresponding to the blue pixel unit 3 .
- the thin film encapsulation layer comprises a first inorganic barrier layer 51 , an organic barrier layer 52 , and a second inorganic barrier layer 53 .
- the first inorganic barrier layer 51 is disposed on the optical coupling output layer 4 and the cathode layer 3 corresponding to the blue pixel unit 203 .
- the organic barrier layer 52 is disposed on the first inorganic barrier layer 51 .
- the second inorganic barrier layer 53 is disposed on the organic barrier layer 52 .
- the first inorganic barrier layer 51 comprises a first inorganic layer 511 and a second inorganic layer 512 .
- the first inorganic layer 511 has a refractive index greater than or equal to 1.76 and less than or equal to 2.
- the second inorganic layer 512 is disposed on the first inorganic layer 511 , a water vapor transmission rate (WVTR) of the second inorganic layer 512 is less than 1 ⁇ 10 ⁇ 4 g/(m 2 ⁇ 24 h).
- WVTR water vapor transmission rate
- the first inorganic layer 511 has a high refractive index, which can improve light output efficiency.
- material of the first inorganic layer 511 comprises any one of SiNx, SiONx, TiOx, or ZnOx, wherein the material is preferably SiNx.
- material of the second inorganic layer 512 comprises any one of SiNx, SiONx, SiOx, Al 2 O 3 , TiOx, ZrO 2 , or ZnOx, wherein the material is preferably SiONx.
- the array substrate 11 includes a flexible base substrate layer 101 , a buffer layer 102 , an active layer 103 , a first gate insulating layer 104 , a first gate layer 105 , a second gate insulating layer 106 , a second gate layer 107 , an interlayer insulating layer 108 , a source/drain layer 109 , an organic planarization layer 110 , and the anode layer 111 .
- Material of the flexible base substrate layer 101 is polyimide (PI).
- the buffer layer 102 , the first gate insulating layer 104 , the second gate insulating layer 106 , the interlayer insulating layer 108 are stacked inorganic layers composed of, for example, SiN/SiOx.
- the active layer 103 is a low-temperature polysilicon layer composed of low-temperature polysilicon.
- Material of the first gate layer 105 and the second gate layer 107 includes Mo.
- the source/drain layer 109 has a stacked structure of Ti/Al/Ti, and material of the organic planarization layer 110 includes polyimide, and the anode layer 111 has a stacked structure of ITO/Ag/ITO or IZO/Ag/IZO.
- the organic light-emitting layer 2 includes a hole injection layer 21 (HIL), a hole transport layer 22 (HTL), an organic light-emitting layer 23 (EML), an electron transport layer 24 (ETL), and an electron injection layer 25 (EIL) stacked sequentially from bottom to top.
- the cathode layer 3 is disposed on the electron injection layer 25 .
- the second embodiment includes all the technical features of the first embodiment.
- the first inorganic barrier layer 51 in the second embodiment further includes a third inorganic layer 513 disposed between the first inorganic layer 511 and the second inorganic layer 512 .
- a refractive index of the third inorganic layer 513 is less than or equal to 1.55.
- material of the third inorganic layer 513 includes SiOx, SiONx, or organic aluminide (Alucone), wherein the material is preferably SiOx.
- the third embodiment includes all the technical features of the second embodiment.
- the difference is that the first inorganic barrier layer 51 in the third embodiment further includes a fourth inorganic layer 514 disposed on the second inorganic layer 512 .
- a refractive index of the fourth inorganic layer 514 is less than or equal to 1.55.
- material of the fourth inorganic layer 514 includes SiOx or SiONx, wherein the material is preferably SiONx.
- the present invention has the following advantages.
- the present invention provides the flexible display panel 100 .
- the optical coupling output layer 4 is not arranged at a position corresponding to the blue pixel unit 203 , so power consumption is reduced, and a service life of the flexible display panel 100 is also prolonged.
- the first inorganic barrier layer 51 of the thin film encapsulation layer 5 completely replaces the optical coupling output layer 4 at the position corresponding to the blue pixel unit 203 . Therefore, the present invention can not only maximize the efficiency of red and green light, but also effectively improve the efficiency of blue light at the same time. Meanwhile, this can also simplify an evaporation process and reduce production costs.
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN202010111845.3 | 2020-02-24 | ||
CN202010111845.3A CN111293232B (en) | 2020-02-24 | 2020-02-24 | Flexible display panel |
PCT/CN2020/083082 WO2021168992A1 (en) | 2020-02-24 | 2020-04-02 | Flexible display panel |
Publications (2)
Publication Number | Publication Date |
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US20230157078A1 US20230157078A1 (en) | 2023-05-18 |
US11903259B2 true US11903259B2 (en) | 2024-02-13 |
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US16/966,035 Active 2042-08-17 US11903259B2 (en) | 2020-02-24 | 2020-04-02 | Flexible display panel |
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US (1) | US11903259B2 (en) |
EP (1) | EP4113640A4 (en) |
CN (1) | CN111293232B (en) |
WO (1) | WO2021168992A1 (en) |
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- 2020-04-02 US US16/966,035 patent/US11903259B2/en active Active
- 2020-04-02 EP EP20767708.9A patent/EP4113640A4/en active Pending
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CN110707146A (en) | 2019-11-22 | 2020-01-17 | 京东方科技集团股份有限公司 | Cover plate, organic light-emitting display panel and display device |
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EP4113640A4 (en) | 2024-04-17 |
EP4113640A1 (en) | 2023-01-04 |
WO2021168992A1 (en) | 2021-09-02 |
US20230157078A1 (en) | 2023-05-18 |
CN111293232B (en) | 2021-06-25 |
CN111293232A (en) | 2020-06-16 |
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